Escaped newlines in double quoted string literals causes premature string truncation

Escaped newlines in double quoted string literals causes premature string truncation

**Describe the bug**

Escaped newlines in double quoted string literals causes premature string truncation. This results in a `YAMLParseError: Missing closing "quote` because the portion of the string after the escaped newline gets ignored, which is what contains the closing quote.

**To Reproduce**

Given a file repro.yaml like this:
```
openapi: "3.0.1"
info:
  title: Test API
  version: "1.0.0"
paths:
  /test:
    get:
      summary: Test endpoint
      responses:
        "200":
          description: "This is a long description that uses an escaped newline\
          \ to continue on the next line."
```

Run this code:
```
const fs = require('fs');
const yaml = require('yaml');

const content = fs.readFileSync('repro.yaml', 'utf-8');

try {
  yaml.parse(content);
} catch (e) {
  console.error(e);
}
```

Which outputs:
```
YAMLParseError: Missing closing "quote at line 11, column 81:
          description: "This is a long description that uses an escaped newline\
                                                                                ^
    at Composer.onError (<CWD>/node_modules/yaml/dist/compose/composer.js:70:34)
    at _onError (<CWD>/node_modules/yaml/dist/compose/resolve-flow-scalar.js:10:42)
    at doubleQuotedValue (<CWD>/node_modules/yaml/dist/compose/resolve-flow-scalar.js:171:9)
    at Object.resolveFlowScalar (<CWD>/node_modules/yaml/dist/compose/resolve-flow-scalar.js:22:21)
    at Object.composeScalar (<CWD>/node_modules/yaml/dist/compose/compose-scalar.js:11:29)
    at composeNode (<CWD>/node_modules/yaml/dist/compose/compose-node.js:26:34)
    at Object.resolveBlockMap (<CWD>/node_modules/yaml/dist/compose/resolve-block-map.js:85:19)
    at resolveCollection (<CWD>/node_modules/yaml/dist/compose/compose-collection.js:13:27)
    at Object.composeCollection (<CWD>/node_modules/yaml/dist/compose/compose-collection.js:59:16)
    at composeNode (<CWD>/node_modules/yaml/dist/compose/compose-node.js:33:38) {
  code: 'MISSING_CHAR',
  pos: [ 226, 227 ],
  linePos: [ { line: 11, col: 81 }, { line: 12, col: 1 } ]
}
```

**Expected behaviour**
The second line of the string should be detected, preventing the error.

**Versions (please complete the following information):**

- Environment: Node.js 24.11.1
- `yaml`: 2.4.1

**Additional context**
I am encountering this when parsing an OpenAPI spec that's automatically generated by Springdoc, which makes working around the issue not as feasible.